{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:26.907721", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2023-Sep-07_to_2023-Sep-10_135.5_62.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2023090000233}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "September 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 10 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 53399.225372910485}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 62.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 135.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "135.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 131.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 137.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 62.97], [130.75, 63.5], [130.97, 64.03], [131.5, 64.25], [131.75, 64.15], [132.0, 64.25], [132.25, 64.15], [132.5, 64.25], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [136.03, 63.53], [136.18, 63.18], [136.25, 63.15], [136.5, 63.25], [137.03, 63.03], [137.18, 62.68], [137.53, 62.53], [137.68, 62.18], [138.03, 62.03], [138.25, 61.5], [138.15, 61.25], [138.25, 61.0], [138.15, 60.75], [138.25, 60.5], [138.03, 59.97], [137.5, 59.75], [137.25, 59.85], [137.0, 59.75], [136.47, 59.97], [136.32, 60.32], [136.25, 60.35], [136.0, 60.25], [135.75, 60.35], [135.5, 60.25], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.25, 61.5], [134.35, 61.75], [134.32, 61.82], [133.97, 61.97], [133.82, 62.32], [133.75, 62.35], [133.5, 62.25], [133.25, 62.35], [133.0, 62.25], [132.47, 62.47], [132.32, 62.82], [132.25, 62.85], [132.0, 62.75], [131.75, 62.85], [131.5, 62.75], [130.97, 62.97]]]]}, "2023-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 62.97], [130.75, 63.5], [130.97, 64.03], [131.5, 64.25], [131.75, 64.15], [132.0, 64.25], [132.25, 64.15], [132.5, 64.25], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [136.03, 63.53], [136.18, 63.18], [136.25, 63.15], [136.5, 63.25], [137.03, 63.03], [137.18, 62.68], [137.53, 62.53], [137.68, 62.18], [138.03, 62.03], [138.25, 61.5], [138.15, 61.25], [138.25, 61.0], [138.15, 60.75], [138.25, 60.5], [138.03, 59.97], [137.68, 59.82], [137.53, 59.47], [137.0, 59.25], [136.47, 59.47], [136.25, 60.0], [136.35, 60.25], [136.32, 60.32], [136.25, 60.35], [136.0, 60.25], [135.75, 60.35], [135.5, 60.25], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.25, 61.5], [134.35, 61.75], [134.32, 61.82], [133.97, 61.97], [133.82, 62.32], [133.75, 62.35], [133.5, 62.25], [133.25, 62.35], [133.0, 62.25], [132.47, 62.47], [132.32, 62.82], [132.25, 62.85], [132.0, 62.75], [131.75, 62.85], [131.5, 62.75], [130.97, 62.97]]]]}, "2023-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 62.97], [130.75, 63.5], [130.97, 64.03], [131.5, 64.25], [131.75, 64.15], [132.0, 64.25], [132.25, 64.15], [132.5, 64.25], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [136.03, 63.53], [136.18, 63.18], [136.25, 63.15], [136.5, 63.25], [137.03, 63.03], [137.18, 62.68], [137.53, 62.53], [137.68, 62.18], [138.03, 62.03], [138.25, 61.5], [138.15, 61.25], [138.25, 61.0], [138.15, 60.75], [138.25, 60.5], [138.03, 59.97], [137.68, 59.82], [137.53, 59.47], [137.0, 59.25], [136.47, 59.47], [136.25, 60.0], [136.35, 60.25], [136.32, 60.32], [136.25, 60.35], [136.0, 60.25], [135.75, 60.35], [135.5, 60.25], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.25, 61.5], [134.35, 61.75], [134.32, 61.82], [133.97, 61.97], [133.82, 62.32], [133.75, 62.35], [133.5, 62.25], [133.25, 62.35], [133.0, 62.25], [132.47, 62.47], [132.32, 62.82], [132.25, 62.85], [132.0, 62.75], [131.75, 62.85], [131.5, 62.75], [130.97, 62.97]]]]}, "2023-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.0, 60.75], [137.53, 60.53], [137.75, 60.0], [137.53, 59.47], [137.0, 59.25], [136.47, 59.47], [136.25, 60.0], [136.47, 60.53], [137.0, 60.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.148363607617114}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.248912066692279}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.8426929325187302, 1.712062113898071, 2.163814647266179, -0.6492451571277797]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.1147328506661438, -0.7145397612513875, -1.4189001700121366, -0.6492451571277797]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.0866585572727665, -5.754530221206311, -4.902768596596401, -5.189475082322815]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.870041166053795, -7.148363607617114, -6.335089863604367, -5.189475082322815]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7272196165401905, -1.9510121440205772, -1.6715633027086252, -1.6360590938895103]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8819690138649663, -2.3604346939716603, -2.002472635331625, -1.6360590938895103]}}